There is no limit to how many Feitorias a player can build other than the population limit. Players can still build one as long as they have at least one population headroom (queued units will count against this headroom). While it is not seemingly worth the population space, it is difficult to place a numeric value on the generation of gold and stone. The Feitoria is most suitable for the late game when resources become scarce, especially stone and gold. Players must be sure to place it in well defended areas in order to protect its slow trickle of resources.